A pneumatically controlled valve

Abstract

The utility model relates to pneumatic control valve technical field especially a kind of pneumatic control valve, including pneumatic control valve base, and the structure same first pneumatic control actuator and second pneumatic control actuator of being installed on it side by side are included.Each execution mechanism includes the execution mechanism shell with first air inlet, execution mechanism piston and execution mechanism spring being set in its execution cavity.Piston is made of piston part, connecting part and plugging part, and spring pushes piston to make plugging part block air inlet.Working, high-pressure gas is pushed into piston to overcome spring force and moves, so that plugging part opens, and gas is exported from gas outlet interface through the gas outlet pipeline in base.The utility model uses double execution mechanism redundancy design, effectively avoids single-point failure, greatly improves reliability;Through spring force and the sealing structure of combination with plugging pad, ensure zero leakage performance under high pressure working condition;Overall structure is compact, and the degree of integration is high, and have pressure monitoring function.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic control valve technology, and in particular to a pneumatic control valve. Background Technology

[0002] In industrial pneumatic systems, pneumatic control valves are critical control components, and their performance directly affects the system's stability and safety. Traditional pneumatic control valves or solenoid valves typically employ a single actuator, posing a significant risk of single-point failure. If this actuator fails due to coil burnout, seal failure, spring fatigue, or impurities, the entire valve will malfunction, leading to system shutdown and potentially even a safety accident. Furthermore, under high-pressure conditions (such as 1.6 MPa and above), the sealing design of traditional valves cannot guarantee absolute zero leakage, posing a risk of internal or external leakage. This is a significant drawback for applications requiring strict airtightness (such as semiconductors, chemicals, and energy).

[0003] Therefore, there is an urgent need in this field for a highly reliable pneumatic control valve that can effectively avoid single-point failures and achieve zero leakage under high pressure. Utility Model Content

[0004] To address the problems mentioned in the background section, this utility model provides a pneumatic control valve, the specific technical solution of which is as follows:

[0005] A pneumatic control valve includes a pneumatic control valve base, a first pneumatic control actuator, and a second pneumatic control actuator. The first and second pneumatic control actuators have identical structures and are both mounted on the pneumatic control valve base. The pneumatic control valve base is provided with a first air outlet, a first air outlet pipe, a second air outlet, and a second air outlet pipe. The first pneumatic control actuator includes an actuator housing, an actuator piston, and an actuator spring. A first air inlet is provided on the side end of the actuator housing, and an actuator cavity is provided on the inner side of the actuator housing. The first air inlet communicates with the actuator cavity. The actuator piston is disposed in the actuator cavity and includes a piston part, a connecting part, and a sealing part. The piston part is slidably embedded in the actuator cavity. The actuator spring is disposed in the actuator cavity and contacts the piston part. The actuator spring pushes the actuator piston to move toward the first air inlet. The sealing part is disposed in the actuator cavity on the side near the first air inlet. The two ends of the connecting part are respectively fixedly connected to the piston part and the sealing part, and the sealing part can block the first air inlet.

[0006] Preferably, the lower side of the execution chamber is a pneumatic cavity, the first air inlet is connected to the pneumatic cavity, and the upper side of the execution chamber is a piston sliding cavity, in which the piston is slidably embedded.

[0007] Preferably, a sealing groove is provided around the periphery of the piston portion, and a sealing ring is provided inside the sealing groove.

[0008] Preferably, the actuator housing includes a housing base and a housing top, the actuator cavity extends through the entire housing base, the housing top is fixedly installed on the top of the housing base, and a base fixing part is provided on the lower side of the housing base, the base fixing part is fixedly installed on the pneumatic valve base.

[0009] Preferably, the outer shell is provided with an air vent that extends through both the inside and outside.

[0010] Preferably, a base sealing groove is provided on the base of the pneumatic valve at the assembly position of the first pneumatic control actuator and the second pneumatic control actuator, and a base sealing gasket is provided in the base sealing groove.

[0011] Preferably, the pneumatic control valve base is further provided with a pressure measuring pipe and a pressure measuring installation port. The pressure measuring pipe is connected to the execution chambers on the first pneumatic control actuator and the second pneumatic control actuator, respectively, and the pressure measuring installation port is connected to the pressure measuring pipe.

[0012] Preferably, the lower end face of the sealing part is provided with a groove, and a sealing pad is provided in the groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Two identical, independently operating pneumatic actuators are installed in parallel to jointly control the pneumatic circuit. If one actuator fails, the other can still independently open and close the valve, completely eliminating the risk of single-point failure and greatly improving the overall reliability and safety of the system.

[0015] Zero-leakage seal: The continuous sealing force is provided by the actuator spring, and combined with the groove structure with sealing gasket on the end face of the sealing part, a highly efficient soft sealing pair is formed, which ensures that the valve can achieve true zero leakage even under high pressure (1.6MPa) conditions when it is closed.

[0016] Compact and integrated structure: All functional components (dual actuators, air pipelines, pressure measurement interfaces) are integrated on a single pneumatic control valve base. The structure is rationally laid out, with good overall rigidity and compact size, reducing external pipeline connections and lowering the probability of leakage and installation complexity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the pneumatic control valve in this application;

[0018] Figure 2 This is a schematic diagram of the usage state of the first air control actuator on the pneumatic valve in this application. Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the usage state of the first air control actuator on the pneumatic valve in this application. Figure 2 ;

[0020] Figure 4 This is a cross-sectional view of the pneumatic control valve in this application;

[0021] Figure 5 This is a schematic diagram of the piston structure of the actuator on the pneumatic control valve in this application;

[0022] Figure 6 This is a cross-sectional view of the pneumatic valve base on the pneumatic valve in this application.

[0023] Reference numerals: 1. Air control valve base; 11. First air outlet; 12. First air outlet pipe; 13. Second air outlet; 14. Second air outlet pipe; 15. Pressure measuring pipe; 16. Pressure measuring installation port; 2. First air control actuator; 21. Actuator housing; 211. First air inlet; 212. Actuation chamber; 213. Housing base; 2131. Housing fixing part; 214. Housing top; 2141. Air outlet; 22. Actuator piston; 221. Piston part; 222. Connecting part; 223. Sealing part; 2231. Sealing gasket; 23. Actuator spring; 3. Second air control actuator; 4. Sealing ring. Detailed Implementation

[0024] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0025] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0026] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0028] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0029] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0030] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0031] like Figures 1 to 6 As shown, a pneumatic control valve includes a pneumatic control valve base 1, a first pneumatic control actuator, and a second pneumatic control actuator 3. The first pneumatic control actuator and the second pneumatic control actuator 3 have the same structure and are both mounted on the pneumatic control valve base 1. The pneumatic control valve base 1 is provided with a first air outlet 11, a first air outlet pipe 12, a second air outlet 13, and a second air outlet pipe 14.

[0032] The first pneumatic actuator includes an actuator housing 21, an actuator piston 22, and an actuator spring 23. The actuator housing 21 has a first air inlet 211 on its side and an actuator cavity 212 inside, with the first air inlet 211 communicating with the actuator cavity 212. The actuator piston 22 is disposed within the actuator cavity 212 and includes a piston portion 221, a connecting portion 222, and a blocking portion 223. The piston portion 221 is slidably embedded in the actuator cavity 212, and the actuator spring 23 is disposed within the actuator cavity 212 and contacts the piston portion 221, pushing the actuator piston 22 towards the first air inlet 211. The blocking portion 223 is disposed within the actuator cavity 212 near the first air inlet 211, and the two ends of the connecting portion 222 are fixedly connected to the piston portion 221 and the blocking portion 223 respectively, enabling the blocking portion 223 to block the first air inlet 211.

[0033] Taking the first pneumatic actuator as an example, it includes an actuator housing 21, an actuator piston 22, and an actuator spring 23. The actuator housing 21 is formed by fixing a housing base 213 and a housing top 214 together with screws. The housing base 213 has a base fixing part 2131 at its lower part for fixing to the pneumatic valve base 1. The housing base 213 has an actuator cavity 212 that runs vertically through it. The lower part of the actuator cavity 212 is a pneumatic cavity, and the upper part is a piston sliding cavity. The side end of the housing base 213 has a first air inlet 211 that communicates with the pneumatic cavity.

[0034] During operation, high-pressure gas enters the execution chamber 212 through the first inlet 211. The increased gas pressure in the execution chamber 212 pushes the piston 221 to compress the spring and move it away from the first inlet 211. The movement of the piston 221, through the connecting part 222, causes the sealing part 223 to move away from the first inlet 211, opening the first inlet 211. The high-pressure gas in the execution chamber 212 is then output through the first outlet 11 and the first outlet pipe 12. When the gas pressure disappears, the actuator spring 23 pushes the piston to reset, causing the sealing part 223 to re-seal the first inlet 211, cutting off the airflow.

[0035] Furthermore, the lower side of the execution chamber 212 is a pneumatic cavity, and the first air inlet 211 is connected to the pneumatic cavity. The upper side of the execution chamber 212 is a piston sliding cavity, and the piston part 221 is slidably embedded in the piston sliding cavity.

[0036] Furthermore, a sealing groove is provided around the piston portion 221, and a sealing ring 4 is provided in the sealing groove to enhance the sealing between the piston portion 221 and the wall of the actuation chamber 212.

[0037] Furthermore, the actuator housing 21 includes a housing base 213 and a housing top 214. The actuation cavity 212 extends through the entire housing base 213, and the housing top 214 is fixedly installed on the top of the housing base 213 to seal the top of the actuation cavity 212. A base fixing part 2131 is provided on the lower side of the housing base 213, and the base fixing part 2131 is fixedly installed on the pneumatic valve base 1.

[0038] The first pneumatic actuator and the second pneumatic actuator 3 are respectively fixedly installed on the two mounting holes of the pneumatic valve base 1 by screws, and static sealing is achieved by the base sealing gasket.

[0039] Furthermore, the outer casing cap 214 is provided with an air outlet 2141 that extends through the inside and outside, which is used to balance the back pressure of the actuator piston 22 when it moves.

[0040] Furthermore, a base sealing groove is provided on the pneumatic valve base 1 at the assembly position of the first pneumatic actuator and the second pneumatic actuator 3, and a base sealing gasket is provided in the base sealing groove to ensure the airtightness of the installation between the actuator and the base.

[0041] Furthermore, the pneumatic valve base 1 is also provided with a pressure measuring pipe 15 and a pressure measuring installation port 16. The pressure measuring pipe 15 is connected to the execution chamber 212 on the first pneumatic actuator and the second pneumatic actuator 3 respectively. The pressure measuring installation port 16 is connected to the pressure measuring pipe 15 and is used to install a pressure sensor to monitor the chamber pressure in real time.

[0042] Furthermore, the lower end face of the sealing part 223 is provided with a groove, and a sealing gasket 2231 is provided in the groove. The elastic deformation of the material is used to achieve a soft seal with the first air inlet 211 to ensure zero leakage.

[0043] Working principle

[0044] Closed state: When there is no control air pressure input to the first air inlet 211, the spring force of the actuator spring 23 pushes the actuator piston 22 downward, causing the sealing gasket 2231 at the lower end of the sealing part 223 to press tightly against the inlet of the first air inlet 211, forming a reliable seal and blocking the air passage. At this time, the valve is in the closed state, achieving zero leakage.

[0045] Open State: When high-pressure control gas enters the pneumatic cavity through the first inlet 211, the gas pressure acts on the end faces of the sealing part 223 and the piston part 221. When this pressure is sufficient to overcome the preload of the actuator spring 23, it pushes the actuator piston 22 upward. The piston part 221 slides upward in the piston sliding cavity, compressing the spring, and at the same time, it drives the sealing part 223 to move upward through the connecting part 222, leaving the first inlet 211 and opening the air passage. The control gas then passes through the opened air passage, through the first outlet pipe 12 inside the pneumatic control valve base 1, and is output from the first outlet port 11.

[0046] Redundancy: The operation of the second pneumatic control actuator 3 is exactly the same as that of the first pneumatic control actuator. The two mechanisms work in parallel and share the load. If the first air inlet 211 of one mechanism is blocked or its internal spring breaks or the piston jams and fails, the other normal mechanism can still independently complete the on / off control, ensuring that the valve will not completely lose its function due to a partial failure.

[0047] One end of the pressure measuring pipe 15 is connected to the execution chamber 212, and the other end is connected to the pressure measuring installation port 16. The user can install a pressure sensor at the pressure measuring installation port 16 to monitor the pressure changes in the execution chamber 212 in real time, providing data support for system status monitoring and fault alarm.

[0048] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A gas operated valve, characterized by The pneumatic control valve base (1), the first pneumatic control actuator (2), and the second pneumatic control actuator (3) are identical in structure. Both the first pneumatic control actuator (2) and the second pneumatic control actuator (3) are mounted on the pneumatic control valve base (1). The pneumatic control valve base (1) is provided with a first air outlet (11), a first air outlet pipe (12), a second air outlet (13), and a second air outlet pipe (14). The first pneumatic control actuator (2) includes an actuator housing (21), an actuator piston (22), and an actuator spring (23). The actuator housing (21) has a first air inlet (211) on its side and an actuator cavity (212) on its inner side. The first air inlet (211) has a first air inlet (211) on its side. The actuator piston (22) is connected to the execution chamber (212). The actuator piston (22) is disposed in the execution chamber (212). The actuator piston (22) includes a piston part (221), a connecting part (222), and a blocking part (223). The piston part (221) is slidably embedded in the execution chamber (212). The actuator spring (23) is disposed in the execution chamber (212) and contacts the piston part (221). The actuator spring (23) pushes the actuator piston (22) to move toward the first air inlet (211). The blocking part (223) is disposed in the execution chamber (212) on the side close to the first air inlet (211). The two ends of the connecting part (222) are fixedly connected to the piston part (221) and the blocking part (223), respectively. The blocking part (223) can block the first air inlet (211).

2. The gas control valve according to claim 1, wherein The lower side of the execution chamber (212) is a pneumatic cavity, and the first air inlet (211) is connected to the pneumatic cavity. The upper side of the execution chamber (212) is a piston sliding cavity, and the piston part (221) is slidably embedded in the piston sliding cavity.

3. The gas control valve of claim 1, wherein, The piston part (221) is provided with a sealing groove around its periphery, and a sealing ring (4) is provided in the sealing groove.

4. The gas control valve of claim 1, wherein, The actuator housing (21) includes a housing base (213) and a housing top (214). The actuator cavity (212) extends through the entire housing base (213). The housing top (214) is fixedly installed on the top of the housing base (213). A base fixing part (2131) is provided on the lower side of the housing base (213). The base fixing part (2131) is fixedly installed on the pneumatic valve base (1).

5. The gas control valve of claim 4, wherein, The outer shell cap (214) is provided with an air outlet (2141) that runs through both the inside and outside.

6. The gas control valve of claim 1, wherein, A base sealing groove is provided on the base (1) of the pneumatic valve at the assembly position of the first pneumatic control actuator (2) and the second pneumatic control actuator (3), and a base sealing gasket is provided in the base sealing groove.

7. The gas control valve of claim 1, wherein The pneumatic control valve base (1) is also provided with a pressure measuring pipe (15) and a pressure measuring installation port (16). The pressure measuring pipe (15) is connected to the execution chamber (212) on the first pneumatic control actuator (2) and the second pneumatic control actuator (3), respectively. The pressure measuring installation port (16) is connected to the pressure measuring pipe (15).

8. The gas control valve of claim 1, wherein, The lower end face of the sealing part (223) is provided with a groove, and a sealing pad (2231) is provided in the groove.

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